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DTC    B1627/82    Lost communication with Side Airbag Sensor LH

DTC    B1628/82    Side Airbag Sensor Assembly LH Initialization Incomplete

DTC    B1637/82    Lost Communication with Rear Airbag Sensor LH

DTC    B1638/82    Rear Airbag Sensor Assembly LH Initialization Incomplete

DTC    B1647/82    Lost Communication with Side Satellite Sensor Bus LH

DTC    B1648/82    Side Satellite Sensor Bus LH Initialization Incomplete

for Preparation Click here


DESCRIPTION

The side collision sensor LH circuit (to determine deployment of the front seat side airbag assembly LH and curtain shield airbag assembly LH) is composed of the center airbag sensor assembly, side airbag sensor LH and rear airbag sensor LH.
The side airbag sensor LH and rear airbag sensor LH detect impacts to the vehicle and send signals to the center airbag sensor assembly to determine if the airbag should be deployed.
These DTCs are stored when a malfunction is detected in the side collision sensor LH circuit (to determine deployment of the front seat side airbag assembly LH and curtain shield airbag assembly LH).

DTC No.
DTC Detection Condition
Trouble Area
B1627/82
B1628/82
B1637/82
B1638/82
B1647/82
B1648/82
  1. The center airbag sensor assembly receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the side collision sensor LH circuit (to determine deployment of the front seat side airbag assembly LH and curtain shield airbag assembly LH).
  2. Side airbag sensor LH malfunction
  3. Rear airbag sensor LH malfunction
  4. Center airbag sensor assembly malfunction
  1. Floor wire
  2. Side airbag sensor LH
  3. Rear airbag sensor LH
  4. Center airbag sensor assembly

WIRING DIAGRAM


C165789E26


INSPECTION PROCEDURE

1.CHECK PRESENT DTC

  1. Turn the power switch on (IG), and wait for at least 60 seconds.

  1. Check for present DTCs (Click here).

    Result:
    Result
    		Proceed to
    Present DTC B1628 or B1648 is output.
    		A
    Present DTC B1647 or 81 is output.
    		B
    Present DTC B1637 or B1638 is output.
    		C
    Present DTC B1627 is output.
    		D
    Present DTC B1627, B1628, B1637, B1638, B1647, B1648 or 82 is not output.
    		E

    HINT:
    1. DTCs indicating communication errors will be changed to DTCs indicating errors in initialization by turning the power switch off and then on (IG) again.
    2. Codes other than DTCs B1627, B1628, B1637, B1638, B1647, B1648 and 82 may be output at this time, but they are not related to this check.



B
Go to step 3

C
Go to step 14

D
Go to step 21

E
USE SIMULATION METHOD TO CHECK (Click here)
A


2.CHECK HISTORY DTC

  1. Turn the power switch on (IG), and wait for at least 60 seconds.

  1. Check for history DTCs (Click here).

    Result:
    Result
    		Proceed to
    History DTC B1627 or B1637 is not output.
    		A
    History DTC B1637 is output.
    		B
    History DTC B1627 is output.
    		C

    HINT:
    Codes other than history DTCs B1627 and B1637 may be output at this time, but they are not related to this check.



B
Go to step 14

C
Go to step 21
A


3.CHECK CONNECTORS

  1. Turn the power switch off.

  1. Disconnect the cable from the negative (-) battery terminal.

    CAUTION:
    Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

  1. Check that the connectors are properly connected to the center airbag sensor assembly, side airbag sensor LH and rear airbag sensor LH.

    OK:
    The connectors are properly connected.

    HINT:
    If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

  1. Disconnect the connectors from the center airbag sensor assembly, side airbag sensor LH and rear airbag sensor LH.

  1. Check that the terminals of connectors are not damaged.

    OK:
    The terminals are not deformed or damaged.



NG
REPLACE FLOOR WIRE
OK


4.CHECK FLOOR WIRE (OPEN)


  1. Using SST, connect terminals 8 (BBL+) and 15 (BBL-) of connector B.


    C171128E04

    NOTICE:
    Do not forcibly insert SST into the terminals of the connector when connecting.

SST
09843-18040  

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    R9-4 (BBL+) - R9-3 (BBL-)
    		Always
    		Below 1 Ω


    Text in Illustration 
    *1
    		Side Airbag Sensor LH
    		*2
    		Center Airbag Sensor Assembly
    *3
    		Floor Wire
    		*4
    		Front view of wire harness connector
    (to Center Airbag Sensor Assembly)
    *5
    		Front view of wire harness connector
    (to Side Airbag Sensor LH)
    		*6
    		Connector B
    *7
    		Connector C
    		-
    		-



NG
REPLACE FLOOR WIRE
OK


5.CHECK FLOOR WIRE (SHORT)


    C145454E14

  1. Disconnect SST from connector B.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    R9-4 (BBL+) - R9-3 (BBL-)
    		Always
    		1 MΩ or higher

    Text in Illustration 
    *1
    		Side Airbag Sensor LH
    *2
    		Center Airbag Sensor Assembly
    *3
    		Floor Wire
    *4
    		Front view of wire harness connector
    (to Side Airbag Sensor LH)
    *5
    		Connector C



NG
REPLACE FLOOR WIRE
OK


6.CHECK FLOOR WIRE (SHORT TO B+)


    C145454E14

  1. Connect the cable to the negative (-) battery terminal.

  1. Turn the power switch on (IG).

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    R9-4 (BBL+) - Body ground
    		Power switch on (IG)
    		Below 1 V
    R9-3 (BBL-) - Body ground
    		Power switch on (IG)
    		Below 1 V

    Text in Illustration 
    *1
    		Side Airbag Sensor LH
    *2
    		Center Airbag Sensor Assembly
    *3
    		Floor Wire
    *4
    		Front view of wire harness connector
    (to Side Airbag Sensor LH)
    *5
    		Connector C



NG
REPLACE FLOOR WIRE
OK


7.CHECK FLOOR WIRE (SHORT TO GROUND)


    C145454E14

  1. Turn the power switch off.

  1. Disconnect the cable from the negative (-) battery terminal.

    CAUTION:
    Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    R9-4 (BBL+) - Body ground
    		Always
    		1 MΩ or higher
    R9-3 (BBL-) - Body ground
    		Always
    		1 MΩ or higher

    Text in Illustration 
    *1
    		Side Airbag Sensor LH
    *2
    		Center Airbag Sensor Assembly
    *3
    		Floor Wire
    *4
    		Front view of wire harness connector
    (to Side Airbag Sensor LH)
    *5
    		Connector C



NG
REPLACE FLOOR WIRE
OK


8.CHECK FLOOR WIRE (OPEN)


  1. Using SST, connect terminals 2 (BCL+) and 1 (BCL-) of connector C.


    C210777E02

    NOTICE:
    Do not forcibly insert SST into the terminals of the connector when connecting.

SST
09843-18040  

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    R9-1 (BCL+) - R9-2 (BCL-)
    		Always
    		Below 1 Ω


    Text in Illustration 
    *1
    		Rear Airbag Sensor LH
    		*2
    		Side Airbag Sensor LH
    *3
    		Floor Wire
    		*4
    		Front view of wire harness connector
    (to Side Airbag Sensor LH)
    *5
    		Front view of wire harness connector
    (to Rear Airbag Sensor LH)
    		*6
    		Connector B
    *7
    		Connector C
    		-
    		-



NG
REPLACE FLOOR WIRE
OK


9.CHECK FLOOR WIRE (SHORT)


    C145445E25

  1. Disconnect SST from connector C.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    R9-1 (BCL+) - R9-2 (BCL-)
    		Always
    		1 MΩ or higher

    Text in Illustration 
    *1
    		Rear Airbag Sensor LH
    *2
    		Side Airbag Sensor LH
    *3
    		Floor Wire
    *4
    		Front view of wire harness connector
    (to Side Airbag Sensor LH)
    *5
    		Connector B



NG
REPLACE FLOOR WIRE
OK


10.CHECK FLOOR WIRE (SHORT TO B+)


    C145445E25

  1. Connect the cable to the negative (-) battery terminal.

  1. Turn the power switch on (IG).

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    R9-1 (BCL+) - Body ground
    		Power switch on (IG)
    		Below 1 V
    R9-2 (BCL-) - Body ground
    		Power switch on (IG)
    		Below 1 V

    Text in Illustration 
    *1
    		Rear Airbag Sensor LH
    *2
    		Side Airbag Sensor LH
    *3
    		Floor Wire
    *4
    		Front view of wire harness connector
    (to Side Airbag Sensor LH)
    *5
    		Connector B



NG
REPLACE FLOOR WIRE
OK


11.CHECK FLOOR WIRE (SHORT TO GROUND)


    C145445E25

  1. Turn the power switch off.

  1. Disconnect the cable from the negative (-) battery terminal.

    CAUTION:
    Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    R9-1 (BCL+) - Body ground
    		Always
    		1 MΩ or higher
    R9-2 (BCL-) - Body ground
    		Always
    		1 MΩ or higher

    Text in Illustration 
    *1
    		Rear Airbag Sensor LH
    *2
    		Side Airbag Sensor LH
    *3
    		Floor Wire
    *4
    		Front view of wire harness connector
    (to Side Airbag Sensor LH)
    *5
    		Connector B



NG
REPLACE FLOOR WIRE
OK


12.CHECK SIDE AIRBAG SENSOR LH


    C166120E08

  1. Connect the connectors to the rear airbag sensor LH and center airbag sensor assembly.

  1. Interchange the side airbag sensor RH with LH and connect the connectors to them.

  1. Connect the cable to the negative (-) battery terminal.

  1. Turn the power switch on (IG), and wait for at least 60 seconds.

  1. Clear the DTCs stored in the memory (Click here).

  1. Turn the power switch off.

  1. Turn the power switch on (IG), and wait for at least 60 seconds.

  1. Check for DTCs (Click here).

    Result:
    Result
    		Proceed to
    DTC B1628, B1647, B1648 or 82 is output.
    		A
    DTC B1623, B1642, B1643 or 81 is output.
    		B
    DTCs B1623, B1642, B1643 or 81 and B1628, B1647, B1648 or 82 are not output.
    		C

    Text in Illustration 
    *1
    		Side Airbag Sensor RH
    *2
    		Center Airbag Sensor Assembly

    HINT:
    Codes other than DTCs B1623, B1642, B1643 or 81 and B1628, B1647, B1648 or 82 may be output at this time, but they are not related to this check.



B
REPLACE SIDE AIRBAG SENSOR LH (Click here)

C
USE SIMULATION METHOD TO CHECK (Click here)
A


13.CHECK REAR AIRBAG SENSOR LH


    C166174E16

  1. Turn the power switch off.

  1. Disconnect the cable from the negative (-) battery terminal.

    CAUTION:
    Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

  1. Return the side airbag sensor RH and LH to their original positions and connect the connectors to them.

  1. Interchange the rear airbag sensor RH with LH and connect the connectors to them.

  1. Connect the cable to the negative (-) battery terminal.

  1. Turn the power switch on (IG), and wait for at least 60 seconds.

  1. Clear the DTCs stored in the memory (Click here).

  1. Turn the power switch off.

  1. Turn the power switch on (IG), and wait for at least 60 seconds.

  1. Check for DTCs (Click here).

    Result:
    Result
    		Proceed to
    DTCs B1623, B1642, B1643, or 81 and B1628, B1647, B1648, or 82 are not output.
    		A
    DTC B1628, B1647, B1648, or 82 is output.
    		B
    DTC B1623, B1642, B1643, or 81 is output.
    		C

    Text in Illustration 
    *1
    		Rear Airbag Sensor RH
    *2
    		Side Airbag Sensor LH

    HINT:
    Codes other than DTCs B1623, B1642, B1643 or 81 and B1628, B1647, B1648 or 82 may be output at this time, but they are not related to this check.



B
REPLACE CENTER AIRBAG SENSOR ASSEMBLY (Click here)

C
REPLACE REAR AIRBAG SENSOR LH (Click here)
A

USE SIMULATION METHOD TO CHECK (Click here)  

14.CHECK CONNECTORS

  1. Turn the power switch off.

  1. Disconnect the cable from the negative (-) battery terminal.

    CAUTION:
    Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

  1. Check that the connectors are properly connected to the side airbag sensor LH and rear airbag sensor LH.

    OK:
    The connectors are properly connected.

    HINT:
    If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

  1. Disconnect the connectors from the side airbag sensor LH and rear airbag sensor LH.

  1. Check that the terminals of connectors are not damaged.

    OK:
    The terminals are not deformed or damaged.



NG
REPLACE FLOOR WIRE
OK


15.CHECK FLOOR WIRE (OPEN)


  1. Using SST, connect terminals 2 (BCL+) and 1 (BCL-) of connector C.


    C210777E02

    NOTICE:
    Do not forcibly insert SST into the terminals of the connector when connecting.

SST
09843-18040  

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    R9-1 (BCL+) - R9-2 (BCL-)
    		Always
    		Below 1 Ω


    Text in Illustration 
    *1
    		Rear Airbag Sensor LH
    		*2
    		Side Airbag Sensor LH
    *3
    		Floor Wire
    		*4
    		Front view of wire harness connector
    (to Side Airbag Sensor LH)
    *5
    		Front view of wire harness connector
    (to Rear Airbag Sensor LH)
    		*6
    		Connector B
    *7
    		Connector C
    		-
    		-



NG
REPLACE FLOOR WIRE
OK


16.CHECK FLOOR WIRE (SHORT)


    C145445E25

  1. Disconnect SST from connector C.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    R9-1 (BCL+) - R9-2 (BCL-)
    		Always
    		1 MΩ or higher

    Text in Illustration 
    *1
    		Rear Airbag Sensor LH
    *2
    		Side Airbag Sensor LH
    *3
    		Floor Wire
    *4
    		Front view of wire harness connector
    (to Side Airbag Sensor LH)
    *5
    		Connector B



NG
REPLACE FLOOR WIRE
OK


17.CHECK FLOOR WIRE (SHORT TO B+)


    C145445E25

  1. Connect the cable to the negative (-) battery terminal.

  1. Turn the power switch on (IG).

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    R9-1 (BCL+) - Body ground
    		Power switch on (IG)
    		Below 1 V
    R9-2 (BCL-) - Body ground
    		Power switch on (IG)
    		Below 1 V

    Text in Illustration 
    *1
    		Rear Airbag Sensor LH
    *2
    		Side Airbag Sensor LH
    *3
    		Floor Wire
    *4
    		Front view of wire harness connector
    (to Side Airbag Sensor LH)
    *5
    		Connector B



NG
REPLACE FLOOR WIRE
OK


18.CHECK FLOOR WIRE (SHORT TO GROUND)


    C145445E25

  1. Turn the power switch off.

  1. Disconnect the cable from the negative (-) battery terminal.

    CAUTION:
    Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    R9-1 (BCL+) - Body ground
    		Always
    		1 MΩ or higher
    R9-2 (BCL-) - Body ground
    		Always
    		1 MΩ or higher

    Text in Illustration 
    *1
    		Rear Airbag Sensor LH
    *2
    		Side Airbag Sensor LH
    *3
    		Floor Wire
    *4
    		Front view of wire harness connector
    (to Side Airbag Sensor LH)
    *5
    		Connector B



NG
REPLACE FLOOR WIRE
OK


19.CHECK SIDE AIRBAG SENSOR LH


    C166120E08

  1. Connect the connector to the rear airbag sensor LH.

  1. Interchange the side airbag sensor RH with LH and connect the connectors to them.

  1. Connect the cable to the negative (-) battery terminal.

  1. Turn the power switch on (IG), and wait for at least 60 seconds.

  1. Clear the DTCs stored in the memory (Click here).

  1. Turn the power switch off.

  1. Turn the power switch on (IG), and wait for at least 60 seconds.

  1. Check for DTCs (Click here).

    Result:
    Result
    		Proceed to
    DTC B1637 or B1638 is output.
    		A
    DTC B1632 or B1633 is output.
    		B
    DTCs B1632 or B1633 and B1637 or B1638 are not output.
    		C

    Text in Illustration 
    *1
    		Side Airbag Sensor RH
    *2
    		Center Airbag Sensor Assembly

    HINT:
    Codes other than DTCs B1632, B1633, B1637 and B1638 may be output at this time, but they are not related to this check.



B
REPLACE SIDE AIRBAG SENSOR LH (Click here)

C
USE SIMULATION METHOD TO CHECK (Click here)
A


20.CHECK REAR AIRBAG SENSOR LH


    C166174E16

  1. Turn the power switch off.

  1. Disconnect the cable from the negative (-) battery terminal.

    CAUTION:
    Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

  1. Return the side airbag sensor RH and LH to their original positions and connect the connectors to them.

  1. Interchange the rear airbag sensor RH with LH and connect the connectors to them.

  1. Connect the cable to the negative (-) battery terminal.

  1. Turn the power switch on (IG), and wait for at least 60 seconds.

  1. Clear the DTCs stored in the memory (Click here).

  1. Turn the power switch off.

  1. Turn the power switch on (IG), and wait for at least 60 seconds.

  1. Check for DTCs (Click here).

    Result:
    Result
    		Proceed to
    DTCs B1632 or B1633 and B1637 or B1638 are not output.
    		A
    DTC B1637 or B1638 is output.
    		B
    DTC B1632 or B1633 is output.
    		C

    Text in Illustration 
    *1
    		Rear Airbag Sensor RH
    *2
    		Side Airbag Sensor LH

    HINT:
    Codes other than DTCs B1632, B1633, B1637 and B1638 may be output at this time, but they are not related to this check.



B
REPLACE CENTER AIRBAG SENSOR ASSEMBLY (Click here)

C
REPLACE REAR AIRBAG SENSOR LH (Click here)
A

USE SIMULATION METHOD TO CHECK (Click here)  

21.CHECK SIDE AIRBAG SENSOR LH


    C166120E08

  1. Turn the power switch off.

  1. Disconnect the cable from the negative (-) battery terminal.

    CAUTION:
    Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

  1. Interchange the side airbag sensor RH with LH and connect the connectors to them.

  1. Connect the cable to the negative (-) battery terminal.

  1. Turn the power switch on (IG), and wait for at least 60 seconds.

  1. Clear the DTCs stored in the memory (Click here).

  1. Turn the power switch off.

  1. Turn the power switch on (IG), and wait for at least 60 seconds.

  1. Check for DTCs (Click here).

    Result:
    Result
    		Proceed to
    DTCs B1622 and B1627 are not output.
    		A
    DTC B1627 is output.
    		B
    DTC B1622 is output.
    		C

    Text in Illustration 
    *1
    		Side Airbag Sensor RH
    *2
    		Center Airbag Sensor Assembly

    HINT:
    Codes other than DTCs B1622 and B1627 may be output at this time, but they are not related to this check.



B
REPLACE CENTER AIRBAG SENSOR ASSEMBLY (Click here)

C
REPLACE SIDE AIRBAG SENSOR LH (Click here)
A

USE SIMULATION METHOD TO CHECK (Click here)